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20109 Alicelandis (1995 RJ)
Classification: Main-belt Asteroid          SPK-ID: 2020109
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237026473300152 8.4165e-08  
a 2.580274399870062 2.7626e-08 AU
q 1.968681058722195 2.2469e-07 AU
i 9.271177057424859 1.022e-05 deg
node 103.526313028337 5.7947e-05 deg
peri 215.8216870306307 6.4248e-05 deg
M 257.6065573343459 3.2592e-05 deg
tp 2457431.092946602522
(2016-Feb-12.59294660)
0.00014179 JED
period 1513.900272726195
4.14
2.4313e-05
6.657e-08
d
yr
n .2377963770042268 3.819e-09 deg/d
Q 3.191867741017929 3.4175e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      13383 days (36.64 yr)  
   first obs. used      1978-07-07  
   last obs. used      2015-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6645  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:59:53  

Additional Information
 Earth MOID = .964314 AU 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4 mag n/a MPO250411  

20109 Alicelandis           Discovered 1995 Sept. 12 by J. L. Tonry at the Michgan-Dartmouth-MIT Observatory.
Alice Landis Tonry (b. 1921) was a graduate of Tufts Medical School, as well as a realtor, farmer and mother.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

[ show close-approach data ]
Alternate Designations
 1995 RJ = 1978 NT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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